Nut-tapping machine.



No. 698,828. Paten-tad Apr.v 29, |992.

, T. FERRY.

NUT TAPPING MACHINE.

(Application led Mar. 31, 1900.) v (No Model.) 5 Sheets-Sheet l.

W/TNESSES 16J; A rroH/vEr v1 .UHHHIII B d d C x r w .w m u D m u N NNNMN. 0 w d m I .K x9 m I- I u u ||H E .w u a o |1 Il T No. 698,828.vPatenfted Apr. 29, |902.

T. FERRY.

NUT TAPPING MACHINE.

(Application led. Mar. 31, 1900.)

5 Sheets-Sham 2.

(No Model.)

' [NVE/vg@ A A rromvfys me imams man: co.. Pnorauwo.. wmnaon u c No.698,828. Patented Apr. 29, |902'. T. FERRY. NUT TAPPING MACHINE.

(Application led. Mar. 31, 1900.)

5 Sheets-Sheet 3.

(No Model.)

.nllgg W/TNESSES /NVENTQ TMA,

w'v AHORA/Em No. 698,828. Patented Apr. 29, |902.

T.l FERRY.

NUT TAPPING MACHINE.

(Applicton led Mar. 31, .1900.)

(no'model.) 5 sheets-sheet 4. 72'5' 6 VLM? IhVl l I i -l Il l| -lcmrf*724 n I il 1 j f7.2., M y

A Tron/v5 yr TN: norm-s PErEns au.. mow-mmc., wsmnmuu, q. c.

Patented Apr. 29, |902.

T. FERRY;

NUT TAPPlNG MAGHIINE.

(Application led Mar. 81, 1900.3

5 Sheets-Sheet 5.

(No Model.)

ATTORNEY-S UNITED STATES PATENT OFFICE.v

THOMAS FERRY, OF CLEVELAND, OHIO.

N'UT-TAPPING MACHINE.

SPECIFICATION forming of Letters Patent N o. 698,828, dated April 29,1902.

' Application iiled March 31. 1900. Serial No. 10,996. (No model.)

To all whom, t muy concern.'

Be it known that I, THOMAS FERRY, a resident of Cleveland, in the countyof Cuyahoga and State of Ohio, have invented certain new and usefulImprovements in vNut-Tapping Machines; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same.

This invention relates to improvements in nuttapping machines.

The object of my invention is to provide an improved nut-tapping machinecomprising mechanism for actuating the tap, means for reversing themovement of said tap-actuating mechanism, mechanism for feeding the nutonto the tap, means for withdrawing the .nut from the tap, means forfeeding the nuts in position for the beginning of the tapping operation,and means for collecting the nuts when the operation is completed.

My invention also consists of certain details of construction andarrangement of parts, which will be fully set forth hereinafter in thespecification, illustrated in the drawings, and pointed out in theclaims.

Referring to the drawings, Figure I represents a longitudinal sectionalview of myimproved machine. Fig. II is a section on lines II II, Fig. I,showing the mechanismfor agitating the nut-receptacle- Fig. III is alongitudinal sectional view showing the relative position of the partsof the machine when the tapping operation is just completed, the nutbeing still on the tap. Fig. IV is a longitudinal sectional view showingthe relative position of the parts of the machine when the tappingoperation has been completed and the nut is almost withdrawn from thetap. Fig. V is a sectional view showing a portion of the work-carriageand a portion of the nutconduit with the sliding gate open and a nutbeing ejected therefrom. FigVIis a sectional view on lines VI VI, Fig.I. Fig. VIIisasectional view on line VII VII, Fig. I, showing the gearfor operating the chuck-spindle. Fig. VIII is a plan of the nut-carryingslide. Fig. IX is a section on line IX IX, Fig. VIII. Fig. X is a sideelevation of the sliding box. Fig. XI is a cross-section on lines XI XI,Fig.

TIII.

Referring to the drawings, a represents the base of the machine. Mountedupon the base a are the pedestals or supports a', a2, and a3, in whichare formed bearings for the shaft c, which extends longitudinally thefull length of the machine. Mounted in bearings in the pedestals ct andCL2, above the shaft c and parallel therewith, is a spindle h. Thisspindle is operatively connected with the shaft c by means of a train ofgears c', so that motion may be imparted from the said spindle to thesaid shaft. The spindle b is provided with a driving 'cone-pulley b. Theinner end of the spindle b is bored centrally for a short extent andprovided with au internal screwthread, as at h2. Into this bore issecured a hollow screw-threaded stem formed integral with the hub ofagear-wheel d. The body of this gear is countersunk, so as to form anannular recess d. Projecting outwardly from the flange of the gear d atdiametrically opposite pointsare the lugs orpins cl3 d3. The object ofthese pins will be explained hereinafter.

A pedestal f extends upwardly from the base ct and supportsa housing f2This housingf is preferably formed in two sections]L12 and f3, suitablysecuredtogether, preferably, so as to be oil-tight. Each of therespective sections is bored so as to form bearings f4 and f5immediately opposite each other and in line with the bore 'in` the'endof the spindle l). This housing f' is located and adapted so as toreceivel the end of the spindle b in the bearingf4 and to inclose thegear d, secured to said spindle. A collar h3 is located on the end ofthe spindle between the bushing h4 and the adjacent portion]E2 of thehousing. This collar serves to prevent dust or other foreign materialfrom working into the interior of the housing. g

In the interior of the housing, immediately opposite and adjacent to thegear' d, is located agear c. This gear is preferably of less diameterthan the gear d andis rotatably secured in its positionby means of anelongated hub or'hollow stem mounted in the bearing f5. The body of thegear e adjacent to the gear d is countersunk, so as to form a recess e',corresponding to the recess d formed in the body of the gear d. The bodyof the gear e is also provided with lugs orpins IOO 621e?,dialnetrically opposite each other. A pinion g is mounted in the lowerpart of the housing,'extending under the gears Zand c and having itsaxis parallel `with the axes of the said gears (Zand e. This vpinionis-located so as to be always in mesh with the gear CZ. Between the gearc and `the pinion g is located a pinion e4, adapted to mesh with boththe gear e and the pinion g.

h represents the chuck-carrying spindle. This spindle is adapted toenter and have its bearing in the hubs ofthe gears d and e,respectively,v and is arranged so that it may have a slight longitudinalmovement in its said bearings. This spindle is provided with lugs orpins h and h2, which extend into the recess formed in the gear CZ or thegear e, according to the relative position of the spindle. The functionof these pins is to engage the pins or lugs on the bodies of the gearsCZ and e, respectively, according as the spindle is moved in or ont inits bearings.

Motion is transmitted to the chuck-spindle as follows: The spindle Z) isrotated by means of the cone-pulley b', which in turn revolves the gearCZ, which is rigid with the said spindle. The said gear CZ in turnrotates the pinionlg, which imparts rotary motion to the pinion e4,which in turn revolves the gear e. It will thus be seen that the gears(Z and e will always revolve when the machine is in motion, but that thegear e will revolve in the opposite direction to that in which theconepulley is being driven. When it is desired that the chuck-spindleshall be driven in the direction in which the cone-pulley is beingdriven, the chuck-spindle is pushed back in its bearings until the lugsh and h2, formed on the said chuck-spindle, enter the recess in the gearCZ, where the lugs will be engaged by the pins d3 CZ3,' and thechuck-spindle will be carried around in the direction in which the gearCZ is moving. When it is desired to reverse the movementof thechuck-spindle, the chuck-spindle is pulled forward until the pins 71.'and h2 enter the recess formed in the gear e,' where they are engaged bythe pins e2 e2. The spindle will then be revolved in the direction inwhich the gear e is revolved, which will be in the opposite direction tothat in which the pulley is being driven.

As will be hereinafter explained, in the operation of my machine thepushing in or pulling ont of the chuck-spindle, so as to cause itsengagement with the respective gears d or f, is automaticallyaccomplished by the engagement of the tap with the work.

A bifn rcated pedestal or support i (shown in cross-section in Fig. IVof the drawings) is mounted on the base ct so as to straddle a portionof the shaft c. On the portion of the shaft c arched by this pedestal isrigidly keyed a cam 7c. This cam is composed of two members rigidlymounted on the shaft c a short distance apart, so as to form acam-groove k'. This groove extends diagonally around the periphery ofthe cam for a quarter of its circnmference at two diametrically oppositepoints and at right angles to the axis of the cam at two diametricallyopposite points the rest of the circumference. The cam will thus impartan intermittent backward and forward motion to the mechanism driventhereby.

The mechanism for feeding the nuts to the tap consists, essentially, ofa positively-actuated intermittingly-reciprocating slide Z .and anut-receiving and carrying slide n, located in juxtaposition to andmovable parallel with said slideZ and adapted to be operated in onedirection by the said slide Z through the medium of a'spring and to bereturned to its original position by a pull of a spring attached to saidslide and the frame of the machine. This mechanism is constructed asfollows: In the top of the pedestal iis formed a slideway t", into whichis itteda sliding box Z, open at its top and forward end. This slidingbox is approximately cruciform in cross-section, as shown in Fig. XI,and the projecting arms Z Z are adapted to,t intogrooves formed in theopposite sides, respectively, of the slideway i. The bottom of theslideway is cut away to permit the free movement of a lug Z2, whichprojects downwardly from the bottom of the sliding box Z. This lug isprovided with a friction-rollerl, adapted to tit into andtravel in theperipheral groove'lc. In the sliding box Z is placed a coiled spring m,having one of its ends abutting against the closed end of said box. f

Immediately above theslideway t" is formed a slideway i3. Into thisslideway is fitted the nut-carrying slide n. A stud or lug n projectsdownwardly from this slide into the sliding box Z and abuts against theforward end of the spring m. At a suitable point on the top of the sliden is secured a stud or lug n2. To this stud is fastened one endof acoiled spring 0. The other end of the spring ois adjustably secured tothe pedestal a3 at the rear of the said slide. A vertical slot oropening n3 is formed in the forward end of the slide n, extending fromthe top to the bottom of the slide. An approximately triangular ledge n4extends part way into this opening and forms a shelf or rest for the nutwhen in position to be tapped. Spring-controlledsupports m5 a5 projectinto this opening and are adapted to hold the nnt vertically ou theledge n4. Sufficient space is leftunimpeded to allow the nut to dropthrough the opening n3 when it is drawn from the ledge n4 and freed fromthe tap. A bore n is formed in the slide fn, extending inwardly from thefront end of the slide and in line with the axis of the chuck-spindle.This bore Vis formed to accommodate the end of the tap after it haspassed through Ythe nut.

p represents a hopper adapted to receive and feed the nuts to thenut-carrying slide n. This hopper is mounted upon the pedestal a3 bymeans of a support 1o and spring connection p2, which allow it to have aslight vibratory movement. This vibratory movement IOO IIO

is imparted to the hopper by means of a toothed wheel 7', mounted on theside of the pedestal a3. When the wheel is revolved, the teeth fr" comein contact with a bar p3, depending from the hopper. This wheel isoperatively connected with the shaft c b y a sprocket-chain s. andsprockets s' S2. The hopper is provided with a feed conduit or spout p4,the mouth of which is located so as to be over the opening yn3 when thework-carriage is in position to receive a nut-blank. The nut slips intothe opening 'n3 and rests on the ledge n4 behind the supports nn. As theslide `n moves forward the upper face of the said slide closes the mouthof the feedconduit, retaining the blanks therein, and said conduit willremain closed until the slide is again drawn backward to its firstposition. At the front end of this spout is located a vertically-slidinggate p5. This gate allows such nuts as will not iit the aperture in thework-carriage to be forced out of the spout by the contact of the uppersurface of the work-carriage.

A receptacle t may be located beneath the machine to receive the nutswhen tapped.

The operation of the machine is as follows: Motion is imparted to themain driving-pulley, which revolves the spindle b. The spindle Z)communicates motion to the shaft c by means of the gearing c. The shaftc revolves the cam Zt'. Vlien the lug Z2 first enters the diagonalportion of the groove Zt', the slide Z is quickly advanced, compressingthe spring m against the lug n and causing the workcarriage to advancetoward the tap. The nut-blank is forced against the tap, and if thechuck-spindle is not already in engagement with the gear CZ the pressureof the nut against the tap pushes the spindle back in its bearings untilit is engaged by the said gear. When the lug Z enters the portion of thegroove Ze which is at right angles to the axis of the cam, the slide Zremains stationary; but as the spring m is compressed by the forwardmovement of the slide Z it continues to push the work-carriage forward.The nut is thus fed to the tap by a continuous yielding pressure untilthe tapping operation is completed. As the cam continues to revolve thelug Z enters the diagonal groove on the opposite side of the cam and theslide Z is drawn back, relieving the forward pressure on the work-carriage. The spring o then pulls the work-carriage backward, and asthe nut remains on the tap it is pulled from the ledge n4 and heldagainst the opposite wall of the opening n3. As the spring o continuesto pull the work-carriage backward the chuckspindle is pulled forwardfrom its engagement with the gear CZ and caused to engage with the geare. The tap will then be rotated in the reverse direction from that inwhich it was being rotated, while the nut-carriage will continue totravel backward, gradually drawing the nut from the tap with justsufficient pressure to permit it to unthread itself without danger ofstripping the thread. Vhen the nut is freed from the tap, it dropsthrough the opening n3 into a convenientlyarranged receptacle if.

1. In a nut-tapping machine, a frame, a

tap, means for imparting rotary movement to said tap, a slide, a camarranged to positively operate said slide in an intermittent backwardand forward direction, in line with said tap,a nutholdiug and feedingcarriage,mount ed independently of said slide and arranged to move inthe path thereof, means substantially as described for holding the nuton said carriage while being tapped, means substantially as describedfor drawing the nut from said tap and a spring mounted on said slide andarranged to exert a pressure upon said carriage when said slide isadvanced toward the tap, substantially as described and for the purposeset forth.

'2. In a nut-tapping machine, a tap, means for imparting rotary movementto the same, a work-,carriage adapted to slide in a suitable support, asliding box located in juxtaposition to said work-carriage, a springlocated in said sliding box having one of its ends abutting against theond of said box and its other end abutting against a lug projecting fromthe work-carriage, and means for intermittently reciprocating saidsliding box forward and backward, substantially as described and for thepurpose set forth.-

3. In a nut-tapping machine, a frame a tap, a driving-spindle foroperating said tap, a work-carriage mounted on said framey and adaptedto slide thereon, a coiled spring having one end connected to saidwork-carriage and the other end connected tothe frame in the rear ofsaid carriage, a lug depending from said work-carriage, a shaft mountedbeneath said driving-spindle, gear-Wheels operatively connecting saidshaft and said driving-spindle, a cam keyed to said shaft below saidwork-carriage, a slide between said workcarriage and said cam andoperativelyconnect ed with said cam, and an elastic medium forming anoperative connection between the said slide and the said work-carriage.

4. In a nut-tapping machine, a'tap-carryi-ng I spindle,suitably-operateddriving mechanism for imparting a rotary movement to Said spindle,suitably-operated mechanismfor reversing the rotary movement ofsaidspindle, a work-carriage adapted to feed the-nut onto the tap and drawitl off from the tap,and means for operating said work-carriage,comprising a cam rotatably mounted-below said work-carriage, a slidelocated between said work-carriage and said cam and operativelyconnected with said cam, and an Aelastic medium forming an operativeconnection between the slideand the said work-carriage.

5. In a nut-tapping machine, a frame, a tap, a driving-spindle foroperating said tap,- a work-carriage mounted on saidfframe and adaptedto slide horizontally thereon, a coiled IOO spring having one endconnected to said work-carriage, and the other end connected to the saidframe in the rear of said Workcarriage, and a positively-driven slideoperatively connected to said Work-carriage by means of a yieldingconnection located between said carriage and said slide, substantiallyas described and fox" the purpose set forth. v

6. In a nut-tapping machine, the combination with a Work-carriage, of adevice for su pplying blanks to said work-carriage, comprising areceptacle secured to springs mounted upon a support located inproximity to said Work-carriage, a discharge-conduit leading from saidreceptacle to said Work-carriage, the mouth of said discharge-conduitbeing lo- -day of February, 1900.

THOMAS FERRY. Vitnesses:

C. H. DORER, VICTOR C. LYNCH.

